Jack.



1. W. BEES. .lA-CK. APPLICATION FILED r11/m23. 1914. yR'ENEWED JULY 1, 1915.

1,172,832. Almnfed Feb. 22,1916.

2 SHEETS-SHEET 2.

` onirica.

JESSE W. BEES, OF ST. PAUL, MINNESOTA.

JACK.

Haasse..

Applicationled March v2.3, 1914, Seria1 No. 826,759.

To @ZZ whom it may concern Be it known that JESSE W'. RnEs, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented a new and useful Improvement in Jacks, of which the following is a specication. l

rlhe object of my invention is the production of a lifting jack of that character which is portablel and adapted for lifting heavy loads with little effort.v

This invention relates to that classof lift* ing jacks in which a rack member carrying head is vertically movable in a suitable ase.

More particularly this invention provides a lifting jack in which power is applied equally on opposite sides of the rack member whereby resistance isl reduced in applying a lifting. effort.

This invention also provides inrcombination with theelements speciied,means for engaging a car wheel or its equivalent to hold it stationary while the lifting effort is applied to a journal boX in which the wheel is mounted.`

Further details of improvement `will be l apparent froml the following" description, and more particularly' pointed out in' the claims.

In the accompanying drawings, Figure 1 is a vertical section of my invention, the section being taken on the line X-X, Fig. 3; Fig. 2 is a section taken on the line Y-Y of Fig. 1; Fig. 3 is another vertical section taken on the line Z-Z of Fig. 2; Fig. 4 is an end view partly broken away and in section ofthe ratchet mechanism for revolving the drive shaft; Fig. 5 is a side elevation of my invention illustrating its application in use for raising a journal box for a car wheel, and Fig. 6 is a plan partly in section of the adjustable stop on the jack.

My invention is composedof three main elements, a base A, a head B, which 1s cari ried by the baseand adapted to raise and lower, and a stop C which is also carried by the base.

The base A is in the form `of a substantially vertical housing having four substan- "tially flatl sides 2, 3, 4 and-5 forming an inclosure, the upper end ofsaid housing being open and. the lower end closed by a floor 6` integral with said sides. Flaced 1n the housing Pare two opposite vertical channel memw bers 7 and 8, each of which is in the form of Specification of' Letters Patent.

Patented Feb. 22, 1916. Renewed July 1,1915. SerialNo. 37,588.

a vertical plate having its side edges turned in to produce two oppositely disposed channels 9 and 10, said `edges being spaced apart to forma vertical passage 11. The channel members 7 and 8 are of similar construction,-the passages 11 being disposed facing eov each other and their plates lying iat upon the sides 2 and 3 of the housing as illustrated. Disposed in the channels 9 and 10 of each channel member are pinions 12 and mounted anda shaft 15 upon which the pinions 13*13 are mounted, whereby the pinions upon each shaft are driven simultaneously. The shafts 14 and 15 are journaled inthe plates and inturned ends of the channel members, suitable journal openings' being provided for that purpose. Passing freely across the housing between the channel members 47 and 8 and journaled in the journal bearings 16 and 17 formed on the sides 4 and 5 is a drive shaft 18. This shaft carries a pair of right and left handed worm pinions 19 and 20, which respectively mesh with worm gears 21 and 22.y These worm gears are respectively mounted upon the shafts 14 and 15, whereby, as the shaft 18 is revolved, the, pairs of pinions 12-12 and 13-13 are turned in opposite directions.

The' drive shaft 18 is revolved in either direction by turningthe wheel 23 which is journaled freely on the shaft 18, and carries a freely pivoted dog 24, said dog being adapted to engage the teeth of a ratchet wheel 25 keyed securely upon said shaft. The wheel 23 is provided with a series of openings 26 in its periphery, in yany one of which the end of a lever handle such as 27 (see Fig. 4) 4is adapted to be inserted to revolve the wheel. The ratchet wheel 25 on one end of the shaft 18 and a collar 28 secured on the opposite end hold the shaft longitudinallyQin the housing. The pinions '19 and 2O being right and left handed reimparted is'formed withv a bifurcated shank 29. The-members 30 and 3l forming the bifurcations respectively consist of ay double rack'having sets ojfteeth4 32 and 33. The oppositely disposed sets of teeth on each rack member, are adapted to mesh with the teeth of the respective pairs of pinions .12--12 and 13-13,.so thatas l'said pmions are revolved in'opposite directions simultaneously as described, the head `is either raised or lowered. .Each rack member is formed with a broad rib 34 lon its inner side wall which is adapted to slide vertically in the passage 11 ,in'the channel member in which the rack member is mounted. When I thepinions 12-'12' and 13-13 are revolved,

power is applied equally on the opposite sides of the racks, thus minimizing lateralV 'and cleaning theworking parts and reassembling the mechanism.

In accordance lwith the patent statutes, I have described the principles of operation of my invention together with the apparatus which I now consider to represent the best embodiment thereofv but I desire to have it understood that the construction shown is only illustrative and -that the invention can be carried out by other means and applied to uses other than those above set forth within the scope of the following claims. l Having described my invention, what I claim as new and desire to protect by Letters Patent is 1. A lifting jack, comprising, in combination, a base element, a shaft journaled in said base element, gear mechanism adapted to be driven by said shaft, means for reJ volving said shaft and a lifting head element formed with a bifurcated shank, each of the arms of said shank being formed with a set of rack teeth on op osite faces thereof, adapted. to mesh witlg said gear mechanism to apply a lifting effort to the opposite sidesl of each of said bifurcations simultaneously. I

2. A lifting jack, comprising, in combination, a base element, a Vdriving shaft journaled in said baseelement, means for revolving said shaft, gear mechanism adapted to be actuated by said shaft, articulatedv 4.supporting means 'removablyseated in said base element and upon which part of said f gear mechanism is journaled and permitted to be, separated from connection with said. drive shaft, and la lifting head element having abifurcatedishank, each" of the bifurcations being'formed withiaf. pair of oppo# sitely disposed sets of rack teeth adaptedto mesh with the teeth of said gear mechanism, whereby a lifting effort is applied to the op'- posite sides of each of the bifurcations of said head element.

3. A lifting jack comprising a base, a lifting element having a bifurcated ,shank slidably, mounted in said base, each fof-lt `e arms of said shank being provided wi h rack teeth on its opposite sides, the adjacent faces of said arms being reduced, channel members disposed within-said base and coperating Iwith the reduce /faces of said arms to guide said lifting el ment in its reciprocal movements, a shaft journaled in said base, andmechanism adapted to b e driven` by said'shaft and engaging the rack teeth on said arms to raise said lifting element.A

4. A lifting jack ycomprising a' base,

spaced 'rectangular members disposed within and extending throughout the height and longitudinal depth of saidbase, said rectangular members being'provided with vertical .shaft an'd engaging the rack teeth on said arms to raise said-lifting element.

5. A lifting jack l comprising a base, spaced rectangular members `disposed within and extending'substantially throughout the height and longitudinal depth of said base, said rectangular members being provided withl vertical passageways opening toward one-another, a lifting element having spaced arms disposed within said rectangular members, fthe adjacent faces of said arms having reduced portions adapted to slide within the passage-ways in said rectangular members to guide said lifting element in'its' reciprocal movements, each of the arms being provided with rack teeth on its opposite sides, a pair of spaced shafts journaled 'in and extndingl transversely across' said "rectangular embeiis, pinions carried by said 'transverse shafts within said rectangular members and .meshing with the rack teeth on said arms, lworm gears carried Iby said transverse shafts between said rec angular members, and a loa'ngitudinal shsft journaled in said base between said rectangular members having right and left hand worms thereon engaging said wormgears for driv# ing said transverse shafts.V

6. A lifting jackgcomprsing a housing, a lifting element having a bifurcated .shank reciprocably mounted-*in said housing,

spaced members within said housm guiding said lifting element in its reciprocal movements, each of the arms of the bifurcated shank being formed with a set of rack teeth on opposite faces thereof, gear mechanism meshing with the rack teeth on the opposite sides of said arms, and a driving shaft journaled in said housing adapted tractuate said gear mechanism to raise said by the turning of said drive shaft vis adapt-l ed to impart a forceful lifting movement to said lifting element. Y

8. A lifting jack, comprising, a housing, a lifting elementA slidably mounted in and guided by said housing having a shank formed with a pair of opposite sets of rack lteeth, gear mechanism meshing with said rack teeth on. the opposite sides 'of said shank, worm pmions meshing With said gear mechanism and a drive lshaft journaled in said housing adapted to actuate said pinions to effect the raising of said lifting element.

9. A lifting jack, comprising, a reciprocable `lifting element having a bifurcated shank, a housing provided With means by which said lifting element is guided in its reciprocation, each of the arms of said bifurcated shank being formed with a set of rack teeth on opposite faces thereof, gear mechanism meshing With the rack teeth on the opposite sides of said arms, and a driv ing shaft journaled in said housing adapted to actuate said gear mechanism to raise said lifting element.

10. A lifting jackcomprising, a reciprocable lifting element, having a bifurcated shank, a housing with means by which said lifting element is guided in its reciprocation, each of the arms of said bifurcatcd shank being formed with a set of rack teeth on opposite faces thereof, sets of gear mech.- an'ism meshing With the rack teeth on the opposite sides of said arms, a Worm pinion in mesh with each of said sets of gearing, and a shaft journaled in said housing and upon which said pinions are mounted to be driven.

11. A lifting `iack, comprising, a housing, a lifting element slidably supported by said housing having a bifurcated shank, each of the arms of said bifurcated shank having a double set of rack teeth, a set of gear mechanism meshing with the teeth of each of said sets of rack teeth and having a spiral drive gear, a drive shaft journaledI in said housing and a pair of oppositely pitched worm gears carried by' said shaft and in mesh to drive said sets of gearing and effect the movement of said lifting element.

12. A lifting jack, comprising, a housing, a lifting element slidably supported by said housing having a bifurcated shank, each of the arms of said bifurcated shank having a double set of rack teeth spaced apart, sets of gears journaled in said housing having pinions of each set meshing with the teeth of said setsof rack teeth on said arms and a spiral gear carried by each of said sets of gears, a drive shaft journaled in said housing and traversing the space between said rack teeth and oppositely pitched Worm epinions on said shaft and meshing with the spiral gears` for the purposes specified.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing Witnesses.

' JESSE W'. BEES.

lVitnesses CLARENCE lV. HALBERT, STELLA L.. VASCHENBERGER. 

